GB2608685A - Bulkhead for optoelectronic component, optoelectronic component and method for manufacturing bulkhead - Google Patents

Abstract

A bulkhead or endcap for an optoelectronic component includes a bulkhead body 1, an injection moulding layer 3 and one or more bulkhead nozzles 2. A through hole 4 is formed inside the bulkhead nozzle 2, and a first cavity 5 inside the bulkhead body. A centre axis of the through hole is parallel to that of the first cavity. End surfaces of the bulkhead nozzle and bulkhead body are connected so that an undersea cable 6 passes through the through hole and the first cavity. The injection moulding layer comprises first and second injection moulding bodies. The first injection moulding body includes a first wrapping body and a second wrapping body which together form an integral structure. The outer side of the bulkhead nozzle is wrapped with the first wrapping body and the outer side of the undersea cable is wrapped with the second wrapping body. The second injection moulding body is of a hollow structure and is inside the through hole and the first cavity. Its inner wall is attached to the undersea cable and its outer wall is attached to the inner wall of the through hole and the inner wall of the first cavity.

Description

BULKHEAD FOR OPTOELECTRONIC COMPONENT, OPTOELECTRONIC COMPONENT AND METHOD FOR MANUFACTURING BULKHEAD

CROSS-REFERENCE TO RELATED APPLICATION

[0001] The present application claims the priority of the Chinese patent application No. 202110529412.4 filed with the China National Intellectual Property Administration on May 14, 2021, entitled "BULKHEAD FOR OPTOELECTRONIC COMPONENT, OPTOELECTRONIC COMPONENT AND METHOD FOR MANUFACTURING BULKHEAD", and the entire content of which is incorporated herein by reference.

FIELD OF THE PRESENT DISCLOSURE

[0002] The present application relates to the technical field of undersea communication, in particular to a bulkhead for an optoelectronic component, the optoelectronic component and a method for manufacturing the bulkhead.

BACKGROUND OF THE PRESENT DISCLOSURE

[0003] Undersea cable is a cable laid on the seabed with optical fibers wrapped inside for transmission of an optical signal at the seabed. As the undersea communication distance is relatively long and a same signal is generally required to be transmitted in a plurality of directions so as to form a communication network, it requires to arrange some optoelectronic devices in the undersea cable to achieve the above function. For example, a repeater (RPT) is arranged in the undersea cable to amplify optical power of the optical signal, and then long-distance transmission of the optical signal is guaranteed; a branching unit (BU) is arranged in the undersea cable to separate one main transmission channel into a plurality of branch transmission channels, so that an optical signal on the main transmission channel is transmitted to the plurality of branch transmission channels, and the same optical signal is transmitted in the plurality of directions.

[0004] In order to guarantee normal use of the optoelectronic devices, it requires to seal these optoelectronic devices to form the optoelectronic component with an insulating function and a waterproof function. With an optoelectronic component shown in Fig. 1 as an example, in general, the optoelectronic component comprises a first bulkhead 10, a second bulkhead 20, a hollow main body 30 and an optoelectronic device 40, wherein the first bulkhead 10 and the second bulkhead 20 are arranged at both ends of the hollow main body 30 respectively to form a shell structure; the optoelectronic device 40 is packaged in the shell structure; through holes 50 are formed in both of the first bulkhead 10 and the second bulkhead 20; an undersea cable 60 may enter the shell structure through the through holes 50 to be electrically connected with the optoelectronic device 40. It can be known from the above structure that, compared with other components, seawater most easily invades the optoelectronic component from the through holes 50. Therefore, it requires to seal the through holes 50.

[0005] In order to seal the through holes 50, an optoelectronic component as shown in Fig. 2 may be employed, wherein the external of the structure as shown in Fig. 1 is wholly wrapped with an injection molding layer 70 so as to exert the sealing effect to the structure shown in Fig. 1. However, due to relatively large size of the structure as shown in Fig. 1, it is difficult to control the quality of the injection molding layer 70, and the sealing performance is still relatively poor. In order to improve the quality of the injection molding layer 70, an optoelectronic component as shown in Fig. 3 may be employed, wherein a local position of the structure shown in Fig. 1 is wrapped with the injection molding layer 70, for example, only the outer sides of the first bulkhead 10 and the second bulkhead 20 are wrapped with the injection molding layer 70. However, due to limitation of exterior structures of the first bulkhead 10 and the second bulkhead 20, bonding force between the injection molding layer 70 and the two of the first bulkhead 10 and the second bulkhead 20 is relatively poor; and therefore, the injection molding layer 70 easily falls off, leading to loss of the sealing effect.

SUMMARY OF THE PRESENT DISCLOSURE

[0006] The application provides a bulkhead for an optoelectronic component, the optoelectronic component and a method for manufacturing the bulkhead, aiming to improve the sealing performance at the through holes of the bulkhead.

[0007] In a first aspect, the application provides a bulkhead for an optoelectronic component, comprising a bulkhead body, an injection molding layer and at least one bulkhead nozzle.

[0008] A through hole is formed inside the bulkhead nozzle, and a first cavity is formed inside the bulkhead body; wherein the center axis of the through hole is parallel to that of the first cavity, and the end surface of the bulkhead nozzle is connected with the end surface of the bulkhead body, so that an undersea cable passes through the through hole and the first cavity.

[0009] The injection molding layer comprises a first injection molding body and a second injection molding body.

[0010] The first injection molding body comprises a first wrapping body and a second wrapping body. The first wrapping body and the second wrapping body form an integral structure, wherein the outer side of the bulkhead nozzle is wrapped with the first wrapping body, and the first wrapping body is attached to the outer side of the bulkhead nozzle; and the outer side of the undersea cable is wrapped with the second wrapping body, and the second wrapping body is attached to the outer side of the undersea cable. [0011] The second injection molding body is disposed inside the through hole and the first cavity and is of a hollow structure, wherein the inner wall of the second injection molding body is attached to the undersea cable; and the outer wall of the second injection molding body is attached to the inner wall of the through hole and the inner wall of the first cavity.

[0012] In this way, a sealing layer may be formed on the outer side of the bulkhead through the injection molding layer and the gaps in the bulkhead is filled, so that the sealing performance of the bulkhead is improved, and seawater is effectively blocked from entering the bulkhead.

[0013] In an implementation, the radial dimension of the second wrapping body is gradually reduced in a direction away from the bulkhead nozzle.

[0014] In this way, transition in dimension between the first wrapping body and the undersea cable may be achieved through the second wrapping body, so that the shear stress of the undersea cable generated in use due to an abrupt dimension change from the second wrapping body to the undersea cable is reduced.

[0015] In an implementation, the first injection molding body and the second injection molding body are of an integrally formed structure.

[0016] In this way, there is seamless connection between the first injection molding body and the second injection molding body, so that a position capable of retaining seawater may be effectively avoided from existing in the injection molding layer, and the sealing performance of the bulkhead is effectively guaranteed.

[0017] In an implementation, the first injection molding body and the second injection molding body are of two separate structures.

[0018] In this way, the first injection molding body and the second injection molding body may be more flexibly assembled and disassembled in the bulkhead; and meanwhile, as the first injection molding body and the second injection molding body are of two separate structures, when the injection molding bodies are mounted in sequence, the quality of the injection molding body which has been currently mounted may be checked at any time according to a mounting sequence to guarantee the sealing performance of the bulkhead.

[0019] In an implementation, a serrated structure is arranged on the outer wall of the bulkhead nozzle and is wrapped with the first wrapping body; and the first wrapping body is attached correspondingly with bulges and trenches in the serrated structure. [0020] In this way, the serrated structure may extend the surface area of the outer wall of the bulkhead nozzle through the bulges and trenches. Once the seawater penetrates into a space between the bulkhead nozzle and the first wrapping body, a penetration path of the seawater may be extended to slow down penetration of the seawater. With the matching effect of the bulges and the trenches, the seawater may be retained in the trenches so as to be blocked from continuously penetrating. Meanwhile, with the serrated structure, the bonding force between the first wrapping body and the bulkhead nozzle may be increased, and then the sealing performance of the bulkhead is improved.

[0021] In an implementation, the injection molding layer is made of a polyethylene material.

[0022] In this way, the injection molding layer has good corrosion resistance and insulating performance and is low in cost, so that the sealing performance of the bulkhead may be effectively guaranteed, and the cost of the bulkhead is lowered at the same time.

[0023] In a second aspect, the application provides an optoelectronic component, comprising a main body, an optoelectronic device and two bulkheads as described in the first aspect.

[0024] The main body is of a hollow structure; the two bulkheads are arranged at both ends of the main body respectively to form a shell structure; and the optoelectronic device is disposed inside the shell structure.

[0025] In this way, the sealing performance of the optoelectronic component may be effectively improved through high sealing performance of the bulkheads.

[0026] In a third aspect, the application provides a method for manufacturing a bulkhead, applied to a bulkhead main body. The bulkhead main body comprises a bulkhead body and at least one bulkhead nozzle, a through hole is formed inside the bulkhead nozzle, and a first cavity is formed inside the bulkhead body; wherein the center axis of the through hole is parallel to that of the first cavity, and the end surface of the bulkhead nozzle is connected with the end surface of the bulkhead body, so that an undersea cable passes through the through hole and the first cavity. The method comprises: [0027] fixing a die to the bulkhead body so as to conduct injection molding treatment on each bulkhead nozzle of the at least one bulkhead nozzle; the die comprises a die shell and a barrier, wherein a target bulkhead nozzle is located in the shell; the barrier is arranged in the through hole and the first cavity to replace the undersea cable and is same as the undersea cable in shape and dimension; and the target bulkhead nozzle is any one of the at least one bulkhead nozzle without being subjected to injection molding treatment; [0028] pouring a molten material into the shell so that the molten material fills a gap between the first cavity and the barrier, a gap between the through hole and the barrier, and a gap between the target bulkhead nozzle and the die shell in sequence; [0029] cooling the molten material, and disassembling the die to obtain an injection molding layer, wherein the injection molding layer comprises a first injection molding body and a second injection molding body.

[0030] The first injection molding body comprises a first wrapping body and a second wrapping body. The first wrapping body and the second wrapping body form an integral structure, wherein the outer side of the target bulkhead nozzle is wrapped with the first wrapping body, and the first wrapping body is attached to the outer side of the target bulkhead nozzle; and the outer side of the barrier is wrapped with the second wrapping body, and the second wrapping body is attached to the outer side of the barrier.

[0031] The second injection molding body is disposed inside the through hole and the first cavity and is of a hollow structure, wherein the inner wall of the second injection molding body is attached to the barrier; and the outer wall of the second injection molding body is attached to the inner wall of the through hole and the inner wall of the first cavity.

[0032] Through the above method, the first injection molding body with the sealing performance may be formed on the outer side of the bulkhead, and meanwhile, the gaps in the bulkhead are fully filled with the second injection molding body. Through the injection molding layer structure formed by the first injection molding body and the second injection molding body, the sealing performance of the bulkhead may be effectively improved, and the seawater is effectively blocked from entering the bulkhead. [0033] In an implementation, before fixing the die to the bulkhead body, the method further comprises: [0034] manufacturing a serrated structure on the outer wall of the target bulkhead nozzle, wherein the serrated structure comprises bulges and trenches arranged at an interval.

[0035] The step of pouring the molten material into the shell so that the molten material fills the gap between the target bulkhead nozzle and the die shell in sequence specifically comprises: [0036] pouring the molten material into the shell so that the molten material fills each trench.

[0037] In this way, the surface area of the outer wall of the bulkhead nozzle may be extended through the bulges and trenches of the serrated structure. Once the seawater penetrates into a space between the bulkhead nozzle and the first wrapping body, a penetration path of the seawater may be extended to slow down penetration of the seawater. With the matching effect of the bulges and the trenches, the seawater may be retained in the trenches so as to be blocked from continuously penetrating. Meanwhile, with the serrated structure, the bonding force between the first wrapping body and the bulkhead nozzle may be increased, and then the sealing performance of the bulkhead is improved.

[0038] In an implementation, the step of pouring the molten material into the shell further comprises a first pouring and a second pouring. The first pouring refers to pouring to the gap between the first cavity and the barrier as well as the gap between the through hole and the barrier; and the second pouring refers to pouring to the gap between the target bulkhead nozzle and the die shell, wherein the second pouring is conducted after the first pouring and formation of the second injection molding body.

[0039] In this way, the quality of the injection molding body which has been currently poured and molded with solidification may be checked at any time according to a mounting sequence to guarantee the injection molding quality and then the sealing performance of the bulkhead.

[0040] With the bulkhead for the optoelectronic component, the optoelectronic component and the method for manufacturing the bulkhead provided by the application, the molten material may be filled into the gap between the first cavity of the bulkhead body and the barrier of the die, the gap between the through hole of the bulkhead nozzle and the barrier as well as the gap between the bulkhead nozzle and the die shell through the die so as to obtain the injection molding layer. The sealing layer may be formed on the outer side of the bulkhead through the injection molding layer and the gaps in the bulkhead are filled, so that the sealing performance of the bulkhead is improved, and the seawater is effectively blocked from entering the bulkhead. By using the optoelectronic component manufactured by the bulkhead with the injection molding layer, the seawater may be effectively blocked, and safe use of the optoelectronic devices inside is ensured.

BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to be more clearly illustrating the technical solutions of the application, the drawings used in the embodiments will be briefly described below. It will be apparent to one of ordinary skill in the art that other drawings may further be obtained based on the accompanying drawings without inventive effort.

[0042] Fig. 1 is a structural schematic diagram of an optoelectronic component.

[0043] Fig. 2 is a structural schematic diagram of a first optoelectronic component after being sealed.

[0044] Fig. 3 is a structural schematic diagram of a second optoelectronic component after being sealed.

[0045] Fig. 4 is a structural schematic diagram of a bulkhead to be subjected to injection molding according to an embodiment of the present application.

[0046] Fig. 5 is a flowchart of a method for manufacturing a bulkhead according to an embodiment of the present application.

[0047] Fig. 6 is a schematic diagram of matching of a die with a bulkhead according to an embodiment of the present application.

[0048] Fig. 7 is a structural schematic diagram of a bulkhead after being subjected to injection molding according to an embodiment of the present application.

[0049] Fig. 8 is a structural schematic diagram of an injection molding layer according to an embodiment of the present application.

[0050] Fig. 9 is a structural schematic diagram of a bulkhead with a second wrapping body having a transition structure according to an embodiment of the present application.

[0051] Fig. 10 is a structural schematic diagram of a bulkhead with a bulkhead nozzle having a serrated structure according to an embodiment of the present application.

[0052] Fig. 11 is a schematic sectional diagram of a structure of a bulkhead with two bulkhead nozzles according to an embodiment of the present application.

[0053] Fig. 12 is a structural schematic diagram of a side surface of a bulkhead with two bulkhead nozzles according to an embodiment of the present application.

[0054] Fig. 13 is a schematic sectional diagram of a structure of a bulkhead with four bulkhead nozzles according to an embodiment of the present application.

[0055] Fig. 14 is a schematic sectional diagram of a structure of a bulkhead with four bulkhead nozzles according to an embodiment of the present application.

[0056] List of reference numerals in the drawings: first bulkhead second bulkhead hollow main body optoelectronic device through hole undersea cable injection molding layer 1 bulkhead body 2 bulkhead nozzle 21 serrated structure 3 injection molding layer 31 first injection molding body 311 first wrapping body 312 second wrapping body 32 second injection molding body 4 through hole first cavity 6 undersea cable 7 die 71 die shell 72 barrier

DESCRIPTION OF THE EMBODIMENTS

[0057] The technical solutions in the embodiments of the present invention are described clearly and completely in the following with reference to accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only part rather than all of the embodiments of the present invention. Based on the embodiments of the present invention, all the other embodiments obtained by those of ordinary skill in the art without inventive effort are within the scope of the present invention.

[0058] In general, in order to guarantee normal use of optoelectronic devices arranged in an undersea cable, these optoelectronic devices may be placed in a sealing device to form an optoelectronic component, so that the optoelectronic devices are prevented from being in contact to seawater. In the embodiments of the present application, the undersea cable may be of a standard model and may further be specially customized (with special dimension and shape); and the optoelectronic devices may be devices with a function of processing an electric signal, such as a RPT and a BU. The sealing device generally comprises a barrel structure and bulkheads arranged at both ends of the barrel structure; the optoelectronic devices are arranged in the sealing device to obtain the optoelectronic component; and the tail ends of two adjacent undersea cables may enter the sealing device through the through holes formed in the two bulkheads respectively and are electrically connected with each other through the optoelectronic devices, so that the optoelectronic devices may process the electric signal transmitted between the two undersea cables. From the structure of the optoelectronic component, if there are gaps between the undersea cable and the through hole, the seawater can enter the optoelectronic component to erode the optoelectronic devices when the undersea cable is used. Therefore, the sealing performance of the bulkhead, i.e., the sealing performance between the through hole formed in the bulkhead and the undersea cable, is the key of guaranteeing normal use of the optoelectronic component. In order to guarantee the sealing performance of the optoelectronic component, the bulkheads may be closed by pouring the injection molding layers.

[0059] The bulkhead may comprise: a bulkhead body 1 and at least one bulkhead nozzle 2. The bulkhead may be illustrated with reference to the structural schematic diagram of the bulkhead shown in Fig. 4, with the bulkhead comprising one bulkhead nozzle 2 as an example, wherein the structure of the bulkhead is amplified. A through hole 4 is formed inside the bulkhead nozzle 2, and a first cavity 5 is formed inside the bulkhead body 1, wherein the through hole 4 is coaxial with the first cavity 5. The end surface of the bulkhead nozzle 2 is connected with the end surface of the bulkhead body 1, so that an undersea cable 6 may pass through the through hole 4 and the first cavity 5 in a direction of the center axis of the undersea cable 6 at the same time without being bent in the bulkhead. In order to achieve the sealing effect of the bulkhead, a gap between the undersea cable 6 and the through hole 4 is avoided by matching the outside dimension of the undersea cable 6 with the inside dimension of the through hole 4. The undersea cable 6 mentioned in the embodiment of the present application is of a universal structure, for example, comprising an inside optical fiber and a sheath wrapping around the outside of the optical fiber. The positions of the undersea cable 6 as being in contact to different components are of different structures, for example, the undersea cable 6 comprises the sheath before entering the through hole 4 and is connected with an optical fiber connecting apparatus in the bulkhead through the inside optical fiber after entering the through hole 4. In the embodiment of the present application, various portions in the undersea cable 6 are not particularly discriminated and collectively referred to herein as the undersea cable 6. It is to be understood that, the undersea cable 6 is of different structures according to different locations. However, in order to achieve disassembly between the undersea cable 6 and the through hole 4, seamless connection therebetween would be difficultly achieved. In this connection, the bulkhead with high sealing performance may be prepared by manufacturing an injection molding layer according to the method for manufacturing the bulkhead, as shown in Fig. 5.

[0060] In S100, a die is fixed to the bulkhead body. The die comprises a die shell and a barrier, wherein the bulkhead nozzle is located in the shell, the barrier is arranged in the through hole and the first cavity to replace the undersea cable, and the barrier is same as the undersea cable in shape and dimension.

[0061] The injection molding layer may be prepared through a pouring mode. Fig. 6 illustrates a schematic diagram of matching the die with the bulkhead. As shown in Fig. 6, the die comprises a die shell 71 and a barrier 72, wherein the die shell 71 is of a split structure. Exemplarily, the split structure comprises symmetrically arranged first part and second part; grooves are formed in the sides, opposite to each other, of the first part and the second part respectively; and the side, with the groove, of the first part is spliced to the side, with the groove, of the second pad to obtain the complete die shell 71. Meanwhile, a complete cavity may be formed by splicing the two grooves; and a shape of the cavity is consistent to that of the injection molding layer designed by a designer. The die shell 71 of the split structure is easy to position during installation and also easy to disassemble after injection.

[0062] For convenience in pouring, the side of the bulkhead body 1 without the bulkhead nozzle 2 is placed on a platform (for example, a flat workbench, a horizontal ground and the like) so as to improve the molding quality of the injection molding layer. At this time, the bulkhead nozzle 2 faces upward. The die shell 71 is fixed to the bulkhead body 1, so that the bulkhead nozzle 2 is located in the cavity of the die shell 71. Specifically, the die shell 71 may be fixed to the bulkhead body 1 in a mode of spot welding, screw connection and the like, so that displacement of the die shell 71 in the pouring process is avoided, and the molding quality of the injection molding layer is guaranteed. Noting that before the die shell 71 is fixed, it requires to enable the bulkhead nozzle 2 to be coaxial with the cavity of the die shell 71 by adjusting the position of the die shell 71. In this way, evenness in thickness of the injection molding layer surrounding the bulkhead nozzle 2 can be guaranteed, and the problem that the injection molding layer is too thin and is easily damaged is solved.

[0063] In order to avoid a high-temperature molten material from damaging the undersea cable 6, the undersea cable 6 would not be assembled in the bulkhead during pouring; and therefore, if the molten material is directly poured at the moment, the molded injection molding layer cannot adapt to the undersea cable 6. In order to solve the above problems, it requires to arrange the barrier 72 in the die shell 71 to replace the undersea cable 6 in the pouring process. In order to completely replace the undersea cable 6 with the barrier 72, it is necessary to ensure that both of the shape and the dimension of the barrier 72 are consistent with the shape and the dimension of the undersea cable 6 at all points of the bulkhead.

[0064] The die shell 71 and the barrier 72 may both be made of titanium alloy. The die made of the titanium alloy has the advantages of fatigue resistance, high specific strength, corrosion resistance, high temperature resistance, stable chemical properties and the like and may provide a foundation for obtaining the high-quality injection molding layer.

[0065] A sprue gate (not shown in the drawing) is formed in the die shell 71. The position of the sprue gate cannot destroy an original structure of the bulkhead and needs to guarantee successful and efficient pouring process at the same time. For example, continuous pouring may be guaranteed, an appointed position may be completely filled, too many bubbles, impurities and the like are avoided from entering the die in the pouring process, and therefore the pouring efficiency may be guaranteed. [0066] In S200, the molten material is poured into the shell so that the molten material fills a gap between the first cavity and the barrier, a gap between the through hole and the barrier as well as a gap between the bulkhead nozzle and the die shell in sequence. [0067] After the die is fixed, a plurality of positions to be poured and filled are formed, i.e., the gap between the first cavity 5 in the bulkhead body 1 and the barrier 72, the gap between the through hole 2 and the barrier 72 as well as the gap between the bulkhead nozzle 2 and the die shell 71. At the time, solidified molten materials (i.e., the injection molding layer) may be formed in the above gaps by pouring the molten material. In this embodiment, a polyethylene (PE) material is selected as the molten material. As the chemical stability of the PE material is good, the injection molding layer manufactured by the PE material is stable in performance. The PE material may adapt to the undersea corrosion environment due to relatively high corrosion resistance of the PE material. Meanwhile, the PE material has high plasticity and is suitable as a molten material to obtain products by means of injection molding. The PE material has good insulation properties, which can meet the insulation requirements of the interior of the bulkhead for a connector of the undersea cable 6. Moreover, the PE material is relatively low in cost and is suitable for mass production. In some embodiments, in order to meet the actual needs, other molten materials, such as a polypropylene (PP) material and a high density polyethylene (HDPE) material etc., may be employed, which are not enumerated herein.

[0068] The pouring process of the molten material can take many forms depending on the needs. In an implementation, one-pour molding may be employed, that is the molten material is continuously poured into the above gaps. The temperature of the molten material is decreased after all the gaps are fully filled, so that the molten material is solidified to form the injection molding layer. In this way, the obtained injection molding layer is of an integrally formed structure. With such mode of one-pour molding, the continuous injection molding layer may be obtained. That is, there will be no gap formed in the injection molding layer; and meanwhile, the molten material only requires one temperature raising and one cooling, so that the efficiency of the whole pouring process is relatively high.

[0069] In another implementation, multiple pouring and molding may be employed. With twice pouring and molding as an example, the pouring process comprises first pouring and second pouring. In each pouring process, the molten material requires to be casted to an appointed position. For example, the first pouring refers to pouring the molten material into the gap between the first cavity 5 and the barrier 72 and the gap between the through hole 4 and the barrier 72; the second pouring refers to pouring the molten material into the gap between the bulkhead nozzle 2 and the die shell 71. After first pouring is completed, it requires to decrease the temperature of the molten material in this part firstly, so that the second pouring is conducted after a corresponding injection molding layer is formed. At the time, the obtained injection molding layer is of a plurality of separate structures, each of which corresponds to one pouring process. As the structure of the injection molding layer is special, if the injection molding layer is obtained by one-pour molding, it will be difficult to detect the quality of the injection molding layer in the gap between the first cavity 5 and the barrier 72 and the gap between the through hole 4 and the barrier 72; and therefore, it is difficult to guarantee the quality of the injection molding layer. By employing multiple pouring and molding, the molding quality of the portion of the injection molding layer after each pouring may be detected correspondingly, and then the quality of each portion of the injection molding layer may be guaranteed.

[0070] From the injection molding process, it requires to control the temperature of the molten material in the injection molding process according to actual needs. For example, the temperature is raised to guarantee the fluidity of the molten material and is decreased to enable the molten material to be solidified and molded. In this context, a heater and a cooler (not shown in the drawing) may be added in the die shell 71 and they are connected with a controller. The controller controls on-off of the heater and the cooler according to programs to achieve different heating temperatures and cooling temperatures.

[0071] In S300, the molten material is cooled, and the die is disassembled to obtain an injection molding layer, wherein the injection molding layer comprises a first injection molding body and a second injection molding body.

[0072] After the molten material is cooled and solidified, the die is disassembled, and then the injection molding layer may be obtained. Noting that, regardless of one-pour injection molding or multiple injection molding used, it requires to disassemble the die only after all the molten material is cooled and solidified, so that the injection molding layer being solidified is prevented from being destroyed by disassembling the die in the solidification process, or the following scenario is prevented: i.e., in the process of multiple injection molding, due to repeated disassembly and mounting of die, there are a misalignment between injection molding layers molded by different pouring processes correspondingly and gaps between the injection molding layers and other components, so that the injection molding layer loses the sealing effect.

[0073] After injection molding, the structural schematic diagram of the bulkhead as shown in Fig. 7 is obtained, wherein the gap between the first cavity 5 in the bulkhead body 1 and the barrier 72, the gap between the through hole 2 and the barrier 72 as well as the gap between the bulkhead nozzle 2 and the die shell 71 are filled with the injection molding layer 3. The specific structure of the injection molding layer 3 may be seen Fig. 8. As shown in Fig. 8, the injection molding layer 3 comprises a first injection molding body 31 and a second injection molding body 32, wherein the first injection molding body 31 is the injection molding layer 3 filled in the gap between the bulkhead nozzle 2 and the die shell 71; and the second injection molding body 32 is the injection molding layer 3 filled in the gap between the first cavity 5 in the bulkhead body 1 and the barrier 72 and the gap between the through hole 2 and the barrier 72.

[0074] Referring to the dashed line as shown in FIG. 8, the first injection molding body 31 is divided by the dashed line to obtain a first wrapping body 311 and a second wrapping body 312. Noting that the division is only for convenience in description of the structure of the first injection molding body 31 and should not be considered as physical division. Therefore, the first wrapping body 311 and the second wrapping body 312 are still of an integral structure. The first wrapping body 311 is located in the gap between the bulkhead nozzle 2 and the die shell 71; the outer side of the bulkhead nozzle 2 is wrapped with the first wrapping body 311; and the first wrapping body 311 is attached to the outer side of the bulkhead nozzle 2. With such attaching structure, a gap between the first wrapping body 311 and the bulkhead nozzle 2 may be effectively prevented, and the sealing effect is exerted here. The inner side of the second wrapping body 312 is attached to the barrier 72. As the undersea cable 6 is replaced by the barrier 72 in the pouring process, the second wrapping body 312 may be attached to the outer side of the undersea cable 6. In this way, there will be no gap between the second wrapping body 312 and the undersea cable 6, so that the seawater is blocked from entering the bulkhead, and the sealing performance is improved.

[0075] The second injection molding body 32 is of a hollow structure. The inner wall of the second injection molding body 32 is attached to the barrier 72. As the undersea cable 6 is replaced by the barrier 72 in the pouring process, the inner wall of the second injection molding body 32 may be attached to the outer side of the undersea cable 6. In this way, there will not be a gap between the second injection molding body 32 and the undersea cable 6, so that the seawater is blocked from entering the bulkhead, and the sealing performance is improved. The outer wall of the second injection molding body 32 is attached to the inner wall of the through hole 4 and the inner wall of the first cavity 5, and the through hole 4 and the first cavity 5 are completely filled. Therefore, spaces which the seawater may enter are effectively filled, the seawater is isolated effectively, and good sealing effect is exerted. Meanwhile, because the injection molding layer 3 is made of an insulating material, contact between the undersea cable 6, etc. and the bulkhead may be effectively blocked, so that the insulating effect is effectively improved. [0076] From the structure of the bulkhead shown in Fig. 7, the sectional dimension of the position, adjacent to the undersea cable 6, of the second wrapping body 312 is larger than that of the undersea cable 6. Therefore, there is an abrupt dimension change between the second wrapping body 312 and the undersea cable 6, and relatively large shear stress is easily generated here. In application, due to the effects of seawater washing and the like, the position with the abrupt dimension change is easily broken under the effect of the shear stress. In order to improve the reliability of connection between the bulkhead and the undersea cable 6, the structure as shown in Fig. 9 may be employed. That is, the second wrapping body 312 may be designed to have a transition structure, wherein the radial dimension of the second wrapping body 312 is gradually reduced in a direction away from the bulkhead nozzle 2, so as to eliminate the abrupt dimension change between the second wrapping body 312 and the undersea cable 6. Accordingly, in order to obtain the second wrapping body 312 of the above structure, it requires that the groove in the die shell 71 is designed to have a corresponding transition structure.

[0077] During the use of the injection molding layer 3, perhaps due to too long use time or defects in injection molding process of the injection molding layer 3, a gap may be generated between the injection molding layer 3 and the bulkhead nozzle 2, and the injection molding layer 3 is even departed from the bulkhead nozzle 2. In order to improve the reliability and the sealing performance of the injection molding layer 3 in the above case, the structure as shown in Fig. 10 may be employed, wherein a serrated structure 21 with alternately arranged bulges and trenches is arranged on the outer wall of the bulkhead nozzle 2. During pouring, it requires to guarantee that the molten material is attached to each of the bulges and the trenches. In this way, the solidified first wrapping body 311 may be fully attached to the serrated structure 21. Through the force between the first wrapping body 311 and the trenches, the bonding force between the first wrapping body 311 and the bulkhead nozzle 2 may be effectively increased, and the first wrapping body 311 is prevented from falling off from the bulkhead nozzle 2. Meanwhile, if there is a gap between the first wrapping body 311 and the bulkhead nozzle 2, the seawater penetrates into the bulkhead through the gap. A flowing pathway of the seawater requires to pass through each of the bulges and the trenches. Apparently, a flowing distance of the seawater in the serrated structure 21 is far larger than that of the seawater on the bulkhead nozzle 2 shown in Fig. 7. Therefore, the time of the seawater entering the bulkhead may be effectively prolonged. If the water inflow is relatively small, the seawater may be dried up gradually in the flowing process, so that the seawater is successfully blocked from penetrating into the bulkhead, and the sealing performance of the bulkhead is improved.

[0078] It can be seen that the bulkhead manufactured through the above process together with the undersea cable 6 may effectively fill the gaps to block the seawater from entering the bulkhead, and the sealing performance is effectively improved. When the optoelectronic component is manufactured with the above bulkhead, for example, the first bulkhead 10 and the second bulkhead 20 in Fig. 1 are both replaced by the above bulkhead, the sealing performance of the optoelectronic component may be effectively improved.

[0079] In some embodiments, the bulkhead may further comprise a plurality of bulkhead nozzles 2, for example, the bulkhead with two bulkhead nozzles 2 as shown in Fig. 11 and Fig. 12, and the bulkhead with four bulkhead nozzles 2 as shown in Fig. 13 and Fig. 14, wherein each bulkhead nozzle 2 is manufactured by using the method as described above. In the injection molding process, one bulkhead nozzle is used as the target bulkhead nozzle, and the injection is made simultaneously or sequentially, whereby the bulkhead nozzle and the injection molding body structure as obtained are the same as the bulkhead nozzle as disclosed above, which will not be described in detail here. Here, the center axis of each bulkhead nozzle 2 is parallel to that of the first cavity 5. The specific number and the distribution positions of the bulkhead nozzles 2 may be arranged according to the actual needs, as long as the structures of two adjacent bulkhead nozzles 2 does not interfered with each other [0080] In the aforementioned embodiments, detailed description of the objectives, technical solutions and beneficial effects of the present invention has been made. It should be understood that the foregoing embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements and the like on the basis of the technical solutions of the present invention are intended to be included by the protection scope of the present invention.

Claims (10)

1. CLAIMS: 1. A bulkhead for an optoelectronic component, comprising: a bulkhead body, an injection molding layer and at least one bulkhead nozzle; a through hole is formed inside the bulkhead nozzle, and a first cavity is formed inside the bulkhead body, wherein a center axis of the through hole is parallel to that of the first cavity, and an end surface of the bulkhead nozzle is connected with an end surface of the bulkhead body, so that an undersea cable passes through the through hole and the first cavity; the injection molding layer comprises a first injection molding body and a second injection molding body; the first injection molding body comprises a first wrapping body and a second wrapping body; wherein the first wrapping body and the second wrapping body form an integral structure; wherein the outer side of the bulkhead nozzle is wrapped with the first wrapping body, and the first wrapping body is attached to the outer side of the bulkhead nozzle; and wherein the outer side of the undersea cable is wrapped with the second wrapping body, and the second wrapping body is attached to the outer side of the undersea cable; the second injection molding body is disposed inside the through hole and the first cavity and is of a hollow structure; wherein the inner wall of the second injection molding body is attached to the undersea cable; and wherein the outer wall of the second injection molding body is attached to the inner wall of the through hole and the inner wall of the first cavity.
2. 2. The bulkhead according to claim 1, wherein the radial dimension of the second wrapping body is gradually reduced in a direction away from the bulkhead nozzle.
3. 3. The bulkhead according to claim 1 or claim 2, wherein the first injection molding body and the second injection molding body are of an integrally formed structure.
4. 4. The bulkhead according to claim 1 or claim 2, wherein the first injection molding body and the second injection molding body are of two separate structures.
5. 5. The bulkhead according to any of claims 1 to 4, wherein the outer wall of the bulkhead nozzle is provided with a serrated structure, the serrated structure is wrapped with the first wrapping body, and the first wrapping body is attached with bulges and trenches in the serrated structure.
6. 6. The bulkhead according to any of claims 1 to 5, wherein the injection molding layer is made of a polyethylene material.
7. 7. An optoelectronic component, comprising: a main body, an optoelectronic device and two bulkheads according to any of claims 1 to 6; wherein the main body is of a hollow structure, the two bulkheads are arranged at both ends of the main body respectively to form a shell structure, and the optoelectronic device is disposed inside the shell structure.
8. 8. A method for manufacturing a bulkhead, applied to a bulkhead main body comprising a bulkhead body and at least one bulkhead nozzle, wherein a through hole is formed inside the bulkhead nozzle, and a first cavity is formed inside the bulkhead body; wherein a center axis of the through hole is parallel to that of the first cavity, and an end surface of the bulkhead nozzle is connected with an end surface of the bulkhead body, so that an undersea cable passes through the through hole and the first cavity; wherein the method comprises: fixing a die to the bulkhead body so as to conduct injection molding treatment on each bulkhead nozzle of the at least one bulkhead nozzle; wherein the die comprises a die shell and a barrier; wherein the target bulkhead nozzle is located in the shell; wherein the barrier is arranged in the through hole and the first cavity to replace the undersea cable; wherein the barrier is the same as the undersea cable in shape and dimension; and wherein the target bulkhead nozzle is any one of the at least one bulkhead nozzle without being subjected to injection molding treatment; pouring a molten material into the shell so that the molten material fills a gap between the first cavity and the barrier, a gap between the through hole and the barrier and a gap between the target bulkhead nozzle and the die shell in sequence; cooling the molten material, and disassembling the die to obtain an injection molding layer, wherein the injection molding layer comprises a first injection molding body and a second injection molding body; wherein the first injection molding body comprises a first wrapping body and a second wrapping body forming an integral structure; wherein the outer side of the target bulkhead nozzle is wrapped with the first wrapping body, and the first wrapping body is attached to the outer side of the target bulkhead nozzle; and wherein the outer side of the barrier is wrapped with the second wrapping body, and the second wrapping body is attached to the outer side of the barrier; wherein the second injection molding body is disposed inside the through hole and the first cavity and is of a hollow structure; wherein the inner wall of the second injection molding body is attached to the barrier; and wherein the outer wall of the second injection molding body is attached to the inner wall of the through hole and the inner wall of the first cavity.
9. 9. The method according to claim 8, wherein before the step of fixing the die to the bulkhead body, the method further comprises: manufacturing a serrated structure on the outer wall of the target bulkhead nozzle, wherein the serrated structure comprises bulges and trenches arranged at an interval; wherein the step of pouring the molten material into the shell so that the molten material fills the gap between the target bulkhead nozzle and the die shell in sequence comprises: pouring the molten material into the shell so that the molten material fills each of the trenches.
10. 10. The method according to claim 8 or claim 9, wherein the step of pouring the molten material into the shell further comprises a first pouring and a second pouring; wherein the first pouring refers to pouring to the gap between the first cavity and the barrier as well as the gap between the through hole and the barrier; and the second pouring refers to pouring to the gap between the target bulkhead nozzle and the die shell; wherein the second pouring is conducted after the first pouring and formation of the second injection molding body.